Vitamin D and Women's Health: The Deficiency Almost Every Urban Indian Woman Has
Reviewed by Dr. Shachi Singh, MBBS
Consultant Gynaecologist & Laparoscopic Surgeon, Prakash Hospital, Noida
Published
Foods rich in vitamin D for bone and immune health.
If you have had your vitamin D tested and your level came back low, you are in very good company. Studies consistently show that 60 to 90% of urban Indian women have vitamin D deficiency or insufficiency — despite living in one of the sunniest countries on earth. The irony is not lost on anyone who has studied this.
Dr. Shachi Singh, consultant gynaecologist at Prakash Hospital, Sector 33, Noida, explains why this matters for women specifically, and what to do.
Why Urban Indian Women Are Deficient
The problem is not the sun. North India receives ample UV radiation for most of the year. The problem is exposure — or the lack of it.
Most urban women spend the majority of daylight hours indoors (office, home, car). When outdoors, the cultural norm of covering arms and legs, combined with sunscreen use, reduces skin exposure dramatically. North Indian winters add months of dense fog that blocks UV radiation even for women who are outdoors. Darker skin — which requires significantly longer sun exposure than lighter skin to produce the same vitamin D — compounds the issue. Dietary sources of vitamin D (fatty fish, egg yolks, fortified foods) are limited in the typical Indian diet, particularly for vegetarians.
The result: near-universal deficiency.
What Vitamin D Actually Does in the Body
Most people know vitamin D supports bone health. That is real — vitamin D is essential for calcium absorption, and deficiency causes rickets in children and accelerates osteoporosis in adults. But vitamin D is also a hormone (not just a vitamin), and its receptors are found in virtually every cell in the body — including ovarian tissue, endometrial cells, immune cells, brain cells, and cardiac muscle.
For women specifically, this matters because
PCOS: Vitamin D receptors exist in ovarian cells and play a role in insulin signalling and follicle development. Multiple studies show that PCOS women have lower vitamin D levels than age-matched women without PCOS, and that vitamin D supplementation in deficient PCOS women improves insulin sensitivity, lowers testosterone levels, and in some studies improves menstrual regularity. Whether low vitamin D causes PCOS or is a consequence of the metabolic dysregulation of PCOS is not fully settled — but supplementing to sufficiency is clearly appropriate.
Fertility: Low vitamin D is associated with lower IVF success rates. Women with adequate vitamin D levels have higher implantation rates and clinical pregnancy rates in IVF than those who are deficient. The endometrium expresses vitamin D receptors — deficiency may impair endometrial receptivity.
Pregnancy: Vitamin D deficiency in pregnancy is associated with gestational diabetes, preeclampsia, low birth weight, and neonatal hypocalcaemia. Vitamin D supplementation in pregnancy reduces the risk of gestational diabetes and preterm birth. Fetal bone mineralisation depends on maternal vitamin D. The current recommendation is 1,000 to 2,000 IU daily during pregnancy — though many specialists advocate higher doses in deficient women.
Immunity: Vitamin D is critical for innate immune function. Deficiency is associated with higher susceptibility to respiratory infections, autoimmune conditions (including thyroid autoimmunity — relevant given India's high prevalence of thyroid disease), and recurrent infections.
Mood and cognitive function: Vitamin D receptors are expressed throughout the brain. Deficiency is associated with higher rates of depression, seasonal mood changes, and cognitive impairment. The relationship is particularly strong for women in their 40s and 50s, where low vitamin D compounds menopausal mood symptoms.
Bone health: The long-term consequence of sustained deficiency is reduced bone density (osteopenia and osteoporosis) and fracture risk — a condition that Indian women are particularly vulnerable to given typically lower bone density, earlier menopause compared to Western populations, and sustained deficiency from young adulthood.
What Level Is Normal — and What Counts as Deficient
Vitamin D is measured as 25-hydroxyvitamin D (25-OH D) in blood.
- Below 20 ng/mL (50 nmol/L): Deficient
- 20 to 29 ng/mL: Insufficient
- 30 to 60 ng/mL: Sufficient — the target range
- Above 60 ng/mL: High normal / potentially excessive (depends on context)
Most urban Indian women without supplementation have levels of 8 to 15 ng/mL — well below the deficient threshold.
How to Correct Deficiency
Sun exposure: 15 to 30 minutes of direct sunlight on arms and legs between 10 AM and 3 PM, three to five times per week, will produce meaningful vitamin D in lighter-skinned individuals in Indian sun. Darker skin requires longer exposure. The problem is that this conflicts with heat and UV exposure concerns for the skin.
Supplementation: The practical solution for most urban women. Standard doses:
- For deficiency correction: 60,000 IU weekly for 8 to 12 weeks (a common Indian prescribing protocol), followed by maintenance
- For maintenance: 1,000 to 2,000 IU daily
- For pregnancy: 1,000 to 2,000 IU daily (check with your obstetrician — some situations warrant higher doses)
- Vitamin D3 (cholecalciferol) is more effective than D2
Recheck the level after 12 weeks of correction to confirm it has reached the target range.
Gynaecological Care in Noida and Greater Noida
Dr. Shachi Singh at Prakash Hospital, Sector 33, Noida, includes vitamin D assessment as part of PCOS management, fertility workup, and antenatal care for women across Noida and Greater Noida.
To book a consultation, call: +91 97023 46853
Clinic Hours: Monday to Saturday, 9 AM – 6 PM | Sunday, 10 AM – 2 PM
Address: D-12A, 12B, Sector-33, G.B. Nagar, Noida, UP 201301
This blog is for educational purposes only.
